A parasitic fungus was spread by a parasect to other pokemon. These fungi took over the pokemon's neurological system, hooking them up to human and pokemon flesh. The disease swept the globe, and no region was secure from the undead. Because it only affects Pokemon, you will be fine if you are bitten, scratched, or otherwise harmed by these creatures. who struggled in the goal of finding a cure, you are a survivor, welcome to the pokemon world...or what remains of it...